Well,
I have an MCPx and I've done the same thing with it, and it works fine...I dunno if that's because it has a tail motor instead of a TT or not. I also have a Trex 250 that I do that with and there's no vibrations (belt drive versus TT). I have a blade 400 3D as well (again, belt drive versus TT)...same thing...no vibes. The 130X...it shook so bad the control rod actually came out of the guide. I don't think it's because it was in my hands, because without the blades on the tail it spun up to 100% throttle with little to no vibes at all (at least not noticeable to me), which leads me to think that the tail shaft is like in the first post's picture of the tail shafts that aren't square. I think I'll contact HH too, and see what can be done. I don't want to fly it and have it crash just to get parts to repair it, I'd rather prevent the crash
I guess I need to learn how to perform 'dynamic' blade balancing. I have a micro blade balancer and they're perfectly balanced with that.

I just want to help you in order to perform well your heli in the first thing you must dobefore the very first airborne push the tailboom until it clik, put another bearings on the tail from blade grip bearing of mcpx you have to ca the other near the tail slider and not to go apart to the stock bearing,put a half groomet on the tail servo linkage and tail slider linkage and you have to ca also the c gear coz the exxsisive play to the the tt well strip the bevel gear and sure the tail gears also. mine is stock solid and fly great,and as stated on the manual in lifting off go quickly to half troutle and hoover while in landing hoover in half troutle slowly to land quickly the heli while touching the ground quickly put down the truotle stick thou.

Quick question...does the tail servo ever stop 'chattering'? I unplugged the main motor so I could check the pitch and the tail servo is CONSTANTLY moving back and forth....WITHOUT any stick input at all...just sitting there it won't stop chattering....is this normal?
Thanks...
Still waitin' on parts from HH...should be here in a couple days...

I just want to help you in order to perform well your heli in the first thing you must dobefore the very first airborne push the tailboom until it clik, put another bearings on the tail from blade grip bearing of mcpx you have to ca the other near the tail slider and not to go apart to the stock bearing,put a half groomet on the tail servo linkage and tail slider linkage and you have to ca also the c gear coz the exxsisive play to the the tt well strip the bevel gear and sure the tail gears also. mine is stock solid and fly great,and as stated on the manual in lifting off go quickly to half troutle and hoover while in landing hoover in half troutle slowly to land quickly the heli while touching the ground quickly put down the truotle stick thou.

Mine doesn't have any room for the little thrust washer from my Mcpx...it's too tight...it made the C/D gears bind...I put a new C gear on and ca'd it in place...the drive train is actually good right now...spun it up without the tail blades and there's no wobble or vibe...it won't stop the shakes/vibes with the tail blades installed. Got new parts coming courtesy of HH! Love their CS! I might go with the MH 'hardened steel' tail rotor shaft...IF it is an improvement over stock. Might have to get some better quality bearings if the new HH ones are still crap...

Quick question...does the tail servo ever stop 'chattering'? I unplugged the main motor so I could check the pitch and the tail servo is CONSTANTLY moving back and forth....WITHOUT any stick input at all...just sitting there it won't stop chattering....is this normal?
Thanks...
Still waitin' on parts from HH...should be here in a couple days...

The microheli tail shaft with blade grips is bogus. The shaft is like butter and bends way too easily. I wish the microheli stuff wasn't so hit or miss.

The MH tail pitch slider is great. I cannot believe you guys are able to fly this heli with the stock pitch slider. I was literally going through them after 1 - 3 flights.. they would instantly bust on me after a few hard pitch pumps/tic tocs.

After i got the MH one, I no longer have any problems with this heli except the tail blades bust after 25 or so flights.
And of course when this happens.. the heli falls out of the sky, one of the tail gears strips, and some other parts break.

Has anyone come up with a solution to this problem? Or am I once again, the only unlucky one with the tail blades flinging off.
They just get looser and looser from rubbing agains the bolt until they finally bust.

The microheli tail shaft with blade grips is bogus. The shaft is like butter and bends way too easily. I wish the microheli stuff wasn't so hit or miss.

The MH tail pitch slider is great. I cannot believe you guys are able to fly this heli with the stock pitch slider. I was literally going through them after 1 - 3 flights.. they would instantly bust on me after a few hard pitch pumps/tic tocs.

After i got the MH one, I no longer have any problems with this heli except the tail blades bust after 25 or so flights.
And of course when this happens.. the heli falls out of the sky, one of the tail gears strips, and some other parts break.

Has anyone come up with a solution to this problem? Or am I once again, the only unlucky one with the tail blades flinging off.
They just get looser and looser from rubbing agains the bolt until they finally bust.

It sounds like you have a vibration problem, the stock slider doesnt break from normal use but if the tail has a vibe it will snap the pin off the bottom of the slider. a vibe could cause the blades to break too.

I have about 200 flights on a stock slider and tail blades but this heli has no spool up vibes.

On the other hand, I bought one that had a spool up vibe and it tossed a tail blade and broke the slider pin in a matter of minutes..lol